Effects of Etchants on Surface Morphologies and Electrochemical Performance of IrO₂-MnO₂ Anodic Nano-Coatings

Authors

Qing-guo FAN, School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;
Zhi-guo YE, School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;Follow
Hui-min MENG, Beijing Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China;
Chun-min Lu, School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;

Corresponding Author

Zhi-guo YE(yezhiguo2008@163.com)

Abstract

The IrO₂-MnO₂ anodic nano-coatings were prepared by the traditional thermal decomposition method on the different surfaces of Ti substrates pretreated by different etchants (HCl, H₂SO₄, C₂H₂O₄ and HF). Surface morphologies and electrochemical performance of the Ti based IrO₂-MnO₂ anodic coatings were investigated by field emission scanning electron microscopy (FESEM), cyclic voltammetry (CV) and polarization techniques. Analysis showed that the denser IrO₂ nano-particles with longer dimensions were obtained at the IrO₂-MnO₂ anodic coating surfaces on the Ti substrates etched by HF and H₂SO₄ as compared with those on the Ti substrates etched by HCl and C₂H₂O₄. The decreasing order of electro-catalytic activities for the IrO₂-MnO₂ anodic nano-coatings on the Ti substrates etched by different etchants is H₂SO₄ > HF > C₂H₂O₄ > HCl.

Graphical Abstract

Keywords

etchants, IrO2-MnO2 coating anode, thermal decomposition, cyclic voltammetric charge, current density

DOI Link

https://doi.org/10.13208/j.electrochem.140516

Publication Date

2015-02-28

Online Available Date

2014-07-25

Revised Date

2014-07-18

Received Date

2014-05-19

Recommended Citation

Qing-guo FAN, Zhi-guo YE, Hui-min MENG, Chun-min Lu. Effects of Etchants on Surface Morphologies and Electrochemical Performance of IrO₂-MnO₂ Anodic Nano-Coatings[J]. Journal of Electrochemistry, 2015 , 21(1): 91-96.
DOI: 10.13208/j.electrochem.140516
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss1/14